This module is part of the language-dependent part of the Foreign Function
Interface (FFI) - for the language-independent part, see Section 5.13. It defines Haskell types corresponding the most
important ISO types of C that are not covered in the module
CTypes.
All definitions are together with the remainder
of the C-specific marshalling support also available via the module
CForeign (Section 5.6).

Every type has a constructor of the same name, which is currently
exported, too. Given the large set of instances for each type, it is
not clear if access to the concrete representation is really necessary.
Some experience is needed before a final decision can be made in this respect.